Boxster costs

Looking at an earlier thread (tvr gassing, Boxster or Tuscan) people appear to have different information on the servicing costs of a Boxster. I am looking into purchasing a Boxster s but would like to find out what running cost's I could expect incur. I have a Tvr Griff so I am use to having large bills but I would like to know what is in store for me.

Any help much appreciated.